... Data LoggerFeatures:1. Input channel, 1,2,3,4,6,8 channel for option.2. Channel Isolation between each channel,no interference3 ... .Communication, RS232/RS485 (Please indicate when ordering) 12. Analog output, 2 line analog output 4 -20 mA (Please indicate when ordering ... display and alarm accuracy, 0.2%FS 15. Trend record accuracy, 0.2% 16. Digital record accuracy, 0.2%FS 17. Input imedance> 10M ...